metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Hardness: 6.5-7 on Mohs scale; Color: Pale to dark green with fuchsitic sheen; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific Gravity: 2.64-2.69
- Hardness
- 6
- Color
- Pale to dark green with fuchsitic sheen
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Pale to dark green with fuchsitic sheen; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal; Cleavage: None; Specific Gravity: 2.64-2.69
Formation & geological history
Formed through the metamorphism of sandstone into quartzite, where small inclusions of green fuchsite mica are trapped within the quartz matrix. Most deposits are Proterozoic in age.
Uses & applications
Primarily used for ornamental carvings, jewelry (cabochons and beads), and as a popular stone in metaphysical/healing collections.
Geological facts
Aventurine is named for 'a ventura' (by chance), a type of Italian glass discovered in the 18th century that looked similar to this natural stone. The sparkling effect seen in the stone is called aventurescence.
Field identification & locations
Identify by its characteristic green color and 'aventurescence' (a shimmering effect caused by mica inclusions). Commonly found in India, Brazil, and Russia. To identify in the field, look for a green, granular quartz with a distinct internal sparkle.
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